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首页> 外文期刊>Chemistry: A European journal >Facile Synthesis of Quasi-One-Dimensional Au/PtAu Heterojunction Nanotubes and Their Application as Catalysts in an Oxygen-Reduction Reaction
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Facile Synthesis of Quasi-One-Dimensional Au/PtAu Heterojunction Nanotubes and Their Application as Catalysts in an Oxygen-Reduction Reaction

机译：准一维Au / PtAu异质结纳米管的简便合成及其在氧还原反应中的催化剂应用

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摘要

An intermediate-template-directed method has been developed for the synthesis of quasi-one-dimensional Au/PtAu heterojunction nanotubes by the heterogeneous nucleation and growth of Au on Te/Pt core-shell nanostructures in aqueous solution. The synthesized porous Au/PtAu bimetallic nanotubes (PABNTs) consist of porous tubular framework and attached Au nanoparticles (AuNPs). The reaction intermediates played an important role in the preparation, which fabricated the framework and provided a localized reducing agent for the reduction of the Au and Pt precursors. The Pt7Au PABNTs showed higher electrocatalytic activity and durability in the oxygen-reduction reaction (ORR) in 0.1M HClO4 than porous Pt nanotubes (PtNTs) and commercially available Pt/C. The mass activity of PABNTs was 218% that of commercial Pt/C after an accelerated durability test. This study demonstrates the potential of PABNTs as highly efficient electrocatalysts. In addition, this method provides a facile strategy for the synthesis of desirable heteronanostructures with controlled size and shape by utilizing an intermediate template.
机译：通过在水溶液中Te / Pt核壳纳米结构上Au的异质成核和生长，开发了一种中间模板指导的方法来合成准一维Au / PtAu异质结纳米管。合成的多孔Au / PtAu双金属纳米管（PABNTs）由多孔管状骨架和附着的Au纳米颗粒（AuNPs）组成。反应中间体在制备过程中起着重要作用，制备了骨架并提供了用于还原Au和Pt前体的局部还原剂。 Pt7Au PABNTs在0.1M HClO4中的氧还原反应（ORR）中显示出比多孔Pt纳米管（PtNTs）和市售Pt / C高的电催化活性和耐久性。经过加速耐久性试验后，PABNTs的质量活性为商品Pt / C的218％。这项研究证明了PABNTs作为高效电催化剂的潜力。另外，该方法为通过利用中间模板合成具有受控大小和形状的所需杂纳米结构提供了简便的策略。

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